[Leica] Leica from my Grandfather - when was it made

[c.blaue@bmsg.de]

Dear specialists!

Wow, I am a lucky man: My father gave me his fathers camera, which has been 
his user camera for approximately 30 years. 
I sent it to Leica Solms to put it in working condition again, since I want to
use it - perhaps with an adapted current 2.8/50 lens.

I would like to know, when it was made. It has the serial number 13916. (Not a
very high number! Oh boys, I am so proud of it). It has a screw mount 3.5/50
Elmar, no viewfinder. So it is probably a Standard.

Thanks for any help.

christoph